#region PDFsharp Charting - A .NET charting library based on PDFsharp
//
// Authors:
//   Niklas Schneider
//
// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Collections;
using System.Collections.Generic;

namespace PdfSharp.Charting
{
    /// <summary>
    /// Base class of all collections.
    /// </summary>
    public abstract class DocumentObjectCollection : DocumentObject, IList
    {
        /// <summary>
        /// Initializes a new instance of the DocumentObjectCollection class.
        /// </summary>
        internal DocumentObjectCollection()
        {
            _elements = new List<DocumentObject>();
        }

        /// <summary>
        /// Initializes a new instance of the DocumentObjectCollection class with the specified parent.
        /// </summary>
        internal DocumentObjectCollection(DocumentObject parent)
            : base(parent)
        {
            _elements = new List<DocumentObject>();
        }

        /// <summary>
        /// Gets the element at the specified index.
        /// </summary>
        public virtual DocumentObject this[int index]
        {
            get { return _elements[index]; }
            internal set { _elements[index] = value; }
        }

        #region Methods
        /// <summary>
        /// Creates a deep copy of this object.
        /// </summary>
        public new DocumentObjectCollection Clone()
        {
            return (DocumentObjectCollection)DeepCopy();
        }

        /// <summary>
        /// Implements the deep copy of the object.
        /// </summary>
        protected override object DeepCopy()
        {
            DocumentObjectCollection coll = (DocumentObjectCollection)base.DeepCopy();

            int count = Count;
            coll._elements = new List<DocumentObject>(count);
            for (int index = 0; index < count; ++index)
                coll._elements.Add((DocumentObject)this[index].Clone());
            return coll;
        }

        /// <summary>
        /// Copies the Array_List or a portion of it to a one-dimensional array.
        /// </summary>
        public void CopyTo(Array array, int index)
        {
            throw new NotImplementedException("TODO");
            //elements.CopyTo(array, index);
        }

        /// <summary>
        /// Removes all elements from the collection.
        /// </summary>
        public void Clear()
        {
            _elements.Clear();
        }

        /// <summary>
        /// Inserts an element into the collection at the specified position.
        /// </summary>
        public virtual void InsertObject(int index, DocumentObject val)
        {
            _elements.Insert(index, val);
        }

        /// <summary>
        /// Searches for the specified object and returns the zero-based index of the first occurrence.
        /// </summary>
        public int IndexOf(DocumentObject val)
        {
            return _elements.IndexOf(val);
        }

        /// <summary>
        /// Removes the element at the specified index.
        /// </summary>
        public void RemoveObjectAt(int index)
        {
            _elements.RemoveAt(index);
        }

        /// <summary>
        /// Adds the specified document object to the collection.
        /// </summary>
        public virtual void Add(DocumentObject value)
        {
            if (value != null)
                value._parent = this;
            _elements.Add(value);
        }
        #endregion

        #region Properties
        /// <summary>
        /// Gets the number of elements actually contained in the collection.
        /// </summary>
        public int Count
        {
            get { return _elements.Count; }
        }

        /// <summary>
        /// Gets the first value in the collection, if there is any, otherwise null.
        /// </summary>
        public DocumentObject First
        {
            get
            {
                if (Count > 0)
                    return this[0];
                return null;
            }
        }

        /// <summary>
        /// Gets the last element or null, if no such element exists.
        /// </summary>
        public DocumentObject LastObject
        {
            get
            {
                int count = _elements.Count;
                if (count > 0)
                    return (DocumentObject)_elements[count - 1];
                return null;
            }
        }
        #endregion

        #region IList
        bool IList.IsReadOnly
        {
            get { return false; }
        }

        bool IList.IsFixedSize
        {
            get { return false; }
        }

        object IList.this[int index]
        {
            get { return _elements[index]; }
            set { _elements[index] = (DocumentObject)value; }
        }

        void IList.RemoveAt(int index)
        {
            throw new NotImplementedException("IList.RemoveAt");
            // TODO:  Add DocumentObjectCollection.RemoveAt implementation
        }

        void IList.Insert(int index, object value)
        {
            throw new NotImplementedException("IList.Insert");
            // TODO:  Add DocumentObjectCollection.Insert implementation
        }

        void IList.Remove(object value)
        {
            throw new NotImplementedException("IList.Remove");
            // TODO:  Add DocumentObjectCollection.Remove implementation
        }

        bool IList.Contains(object value)
        {
            throw new NotImplementedException("IList.Contains");
            // TODO:  Add DocumentObjectCollection.Contains implementation
            //return false;
        }

        int System.Collections.IList.IndexOf(object value)
        {
            throw new NotImplementedException("IList.IndexOf");
            // TODO:  Add DocumentObjectCollection.System.Collections.IList.IndexOf implementation
            //return 0;
        }

        int IList.Add(object value)
        {
            throw new NotImplementedException("IList.Add");
            // TODO:  Add DocumentObjectCollection.Add implementation
            //return 0;
        }
        #endregion

        #region ICollection
        bool ICollection.IsSynchronized
        {
            get { return false; }
        }

        object ICollection.SyncRoot
        {
            get { return null; }
        }
        #endregion

        /// <summary>
        /// Returns an enumerator that iterates through a collection.
        /// </summary>
        /// <returns>
        /// An <see cref="T:System.Collections.IEnumerator"/> object that can be used to iterate through the collection.
        /// </returns>
        public IEnumerator GetEnumerator()
        {
            return _elements.GetEnumerator();
        }

        List<DocumentObject> _elements;
    }
}